Hereditary Defect of the Sacrum and Coccyx With Anterior Sacral Meningocele

Summary Six familial cases of partial absence of the sacrum and the coccyx are described. Four had sacral ventral meningocele. There was a sex‐linked dominant inheritance. The diagnosis of the meningocele was established by myelography. The symptoms were constipation and incontinence of urine. Three patients also had recurrent infections of the urinary tract, and three had congenital anal stenosis.